Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolRead more
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolution of true animals or metazoa.
Define phylogeny.
Phylogeny is ancestry of an organisms i.e., evolutionary history of an organism.
Phylogeny is ancestry of an organisms i.e., evolutionary history of an organism.
See lessGive one point of difference between Gymnosperms and Angiosperms.
Seeds are naked or exposed in gymnosperms but they are covered by fruit wall or pericarp in angiosperms.
Seeds are naked or exposed in gymnosperms but they are covered by fruit wall or pericarp in angiosperms.
See lessWhat is haemocoel? Which groups of animals have haemocnel?
The blood-filled cavity consisting of spaces in between organs is known as haemocoel. Examples. Mollusca and Arthropoda.
The blood-filled cavity consisting of spaces in between organs is known as haemocoel. Examples. Mollusca and Arthropoda.
See lessName the organisms which has (i) Setae and parapodia (ii) Tube feet.
(i) Nereis, (ii) Starfish.
(i) Nereis, (ii) Starfish.
See lessWhy are protozoa are called early animals?
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolRead more
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolution of true animals or metazoa.
See less